The suspects rode up to the men and stabbed the brothers through the open windows of their car at 30th Road and 23rd Street at around 8 p.m.
The 18-year-old driver was stabbed in the left arm and left side of the body. He was taken to New York Presbyterian Hospital Cornell in stable condition.
His 20-year-old brother, who was his passenger, was stabbed below his right eye. He was in stable condition at Elmhurst Hospital
The suspects, who stabbed the victims through the front driver and passenger side windows, fled southbound on 23rd Street, abandoning the scooter.
Detectives are looking into whether the stabbing stemmed from the vehicle bumping into one of the scooters.
Police Commissioner Dermot Shea said Thursday morning the incident "appears to be road rage."
It does not appear the victims knew their attackers.
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